Improvement in governors for engines



FQBURNS. Governors for Engines. Nd. 212,185.

Patent ed Feb. 11, 1879.

Wailwaw M. maAdW MPEYERS, PRQTO UTMQGRAFHER. WASHINGTON, D C.

UNITED STATES PATENT FRANK BUB-NS, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO CHARLES MARQUEDANT BURNS, JR, OF SAME PLACE.

IMPROVEMENT IN GOVERNORS FOR E NGINES.

Specification forming part of Letters Patent No. 212,185, dated February11, 1879 application filed December 14, 1878.

To all whom it may concern:

Be it known that I, FRANK BURNS, of the city and county of Philadelphia,State of Pennsylvania, have invented a certain new and usefulImprovement in Governors for Steam-Engines, which improvement is fullyset forth in the following specification, reference being had to theaccompanying drawings.

My invention is intended to govern the speed of the steam-engine byregulating the supply of steam admitted to the cylinder.

Referring to the accompanying drawings, Figure 1 represents a sectionalview of the governor. Fig. 2 represents a general outside view. Fig. 3represents the valve enlarged. Fig. 4: represents a plan of thescrew-wheel and box containing the liquid. Fig. 5 represents an enlargedview of the jacket and the wheel H, with the gear-wheel attached.

D represents the case, in which the valve 0 is allowed to turn and riseand fall, its motion being governed by the rod B, fastened through itscenter. A A are loose weights resting on the top of the case D, withholes in the center, to allow them to be readily taken off or put on therod B. V is a collar fastened to the rod B, and capable of bearing theweights A A. F is a gear-wheel on the shaft with the belt-pulley. E is agear-wheel on the loose jacket G, which is kept in position by havinghearings on the boX K and the under side of the case D. This loosejacket has slots or openings pierced on two sides, suflicient to allowthe wheels H H to pass freely the full distance which the motion of therod may require.

The small wheels H H have a pin, on which theyrevolve, passing throughthe rod B. These wheels are used to avoid the friction which a simplepin might have in passing up or down in the slot.

K is a box, containing the liquid in which the screw-wheel N revolves.

The operation will be seen by referring to the drawings, in which thevalve 0 and parts connected with itviz., H H and N-by the rod B areshownin the positions it is intended they shall hold when the engine isat ordinary speed. \Vheu the governor is at rest the rod B rests on thebottom of the box K, containing the liquid. The valve 0 will then nearlyclose the steam-ports S S. Sufficient opening is, however, allowed togive the engine enough steam to start it. The motion is communicated tothe wheels F and E. The latter, being fastened to the jacket G, carriesthe rod with it in revolving. The screw-wheel N, having the resistanceof the liquid, lifts the valve, which is the only weight it has to lift,until the collar V meets the weights AA, as shown in drawings.

So long as the engine revolves at ordinary speed (which may be adjustedby putting on or taking off the weights,) the resistance of thescrew-wheel to the liquid will sustain the valve in this position; butshould the speed be increased, the resistance of the screw-wheel to theliquid will overcome the resistance of the weights, and, rising, tend toclose the valve and reduce the supply of steam. l/Vhen the speed isdiminished the weights tend to carry the valve down to its formerposition.

Another advantage is, that should the driving-belt break or run off thepulley, so as to disconnect the governor, the valve, being no longersustained by the motion of the screwwheel N, falls by its own weight,and cuts off the supply of steam.

' What I claim as new, and desire to secure by Letters Patent, is

The combination of the valve 0, screw-wheel N, operating in a liquid,and the weights AA, all three mounted upon a shaft having a collar, V,to carry the weights, said shaft being provided with wheels or rollers,which move in a slot in a loose jacket, G, substantially as and for thepurpose specified.

FRANK BURNS.

Witnesses:

OSCAR R. lVIEYER-S, CHAS. D. CLARK.

FFIOE.

